中文摘要：

对昌图、沈阳玉米田棕壤物理性质与产量关系的研究表明，高产玉米田土壤耕层厚度为19～24cm，平均为22cm，体积质量低于低产田，耕层土壤总孔隙度与通气孔隙度平均分别为52．5％、12．7％，田间持水量为26．4％～30．9％，水稳性团聚体含量与团聚体的水稳性系数分别在20％、25％以上。土壤主要物理指标对玉米产量影响表现为耕层土壤体积质量〉耕层厚度〉耕层土壤总孔隙度〉耕层土壤通气孔隙度〉犁底层厚度，玉米产量与上述各指标的相关系数分别为0．98、0．73、0．65、0．52、0．46。

英文摘要：

The relationship of soil physical properties and maize yield was investigated and analyzed in Changtu and Shenyang city of Liaoning province. The results of field investigation showed that the soil characters of filed with high maize yield were thick topsoil layer （19--24 cm）, low soil bulk density, soil total porosity and capillary porosity were 52.5% and 12.7% respectively, field capacity was 26.4%--30.9%. The soil waterstable aggregate was greater than 20%, the stability coefficient was higher than 25%. The effect intensity of main soil physical indices on the yield was in the order of bulk density〉topsoil d efficient were 0. 98, epthtotal porosity）capillary porosity）subsoil depth, and the correlation co- 73, 0. 65, 0. 52, 0. 46 respectively.